urogenital sinus

noun
plural urogenital sinuses

Definition of urogenital sinus

1 : the ventral part of the embryonic mammalian cloaca that is formed by the growth of a fold dividing the cloaca where the hindgut and allantois meet and that eventually forms the neck of the bladder and some parts of the urinary and reproductive systems
2 : a rare urogenital abnormality in which the urethral and vaginal tracts open into a common channel and share a single opening

First Known Use of urogenital sinus

1868, in the meaning defined at sense 1

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The first known use of urogenital sinus was in 1868

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Dictionary Entries Near urogenital sinus

urogenital

urogenital sinus

urogenous

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Cite this Entry

“Urogenital sinus.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/urogenital%20sinus. Accessed 28 Sep. 2021.

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More Definitions for urogenital sinus

urogenital sinus

noun

Medical Definition of urogenital sinus

1 : the ventral part of the embryonic mammalian cloaca that is formed by the growth of a fold dividing the cloaca where the gut and allantois meet and that eventually forms the neck of the bladder and some of the more distal portions of the genitourinary tract
2 : a rare urogenital abnormality in which the urethral and vaginal tracts open into a common channel and share a single opening

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